Another sign was changed to "Bernie for President" and, days earlier, the same portable sign that was changed to bash Trump read "Party hardy" for the Memorial Day holiday weekend.

Tony Hartzel of the Texas Department of Transportation told InsideEdition.com that these pranks are no laughing matter.

"These signs were secured and turned off until someone broke into them to enter these messages," Hartzel said in a statement. "Such actions endanger the safety of themselves and motorists, and the messages could also become a distraction to motorists driving on the highway."